Benjamin schaedt



(No Model.) 'B. SGHARDT.

FASTENER FOR GOG WHEEL KEYS. No. 392,972. PatentedNov. 13,1888.

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UNITED STATES FFICE.

PATENT BENJAMIN SCHARD'I, OF DAYTON, OHIO, AS SIGNOR OF ONE-HALF TO JOHN R. FLETCHER, OF SAME PLACE.

FASTENER FOR COG-WHEEL KEYS.

SPECIFICATION forming part of Letters Patent No. 392,972, dated November 13, 1888.

Application filed February 20, 1888. Serial No. 264.604.

T aZZ whom. it may concern:

Beitknown that LBENJAMIN SOHARDT,acitizen oftheUnited States, residing at Dayton, in the county of Montgomery and State of Ohio,

have invented a certain new and useful Improvement in Fasteners for Cog-Wheel Keys,

and I do hereby declare that the following is a full, clear, and exact description of the invention,which will enable others skilled in the art to to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification. v p

[3 My invention relates to an improvement in fasteners for cog-wheel keys; and it consists of the ordinary wooden key provided with a transverse notch in its under side, in which is held a curved metallic spring whose edges en gage the sides of the cogs as it is being driven home, and from which the said key cannot be withdrawn,as the edges engage the cogs by indentation, and thereby the key is firmly held in position.

2 The mechanism is illustrated in the accompanying drawings, in which- Figure l is a side view of a cog-wheel in which but three cogs are shown. Fig. 2 is a section of two cogs on a line of the inner surface of the rim of the cog-wheel and the inner surface of the wooden key, with a curved spring in a notch of the same. Fig. 3 is a side view of the said key. Fig. 4 is two views of the metallic fastener.

5 Likeletters designate like parts throughout the several views.

A is an ordinary cast-iron wheel, which has apertures throughout its periphery to receive wooden cogs. Three cogs are shown at b, Fig.

0 1, and the two wooden keysc are used to bind (No model.)

the said cogs within the wheel. These parts are constructed as usual, the cogs and keys having the proper bevel, so that the driving home ofthe key firmly binds the cogs within the rim. Within the inner surface of the wooden 5 key is formed the notch 6, Figs. 2and 3. This notch binds the body of the metallic spring (1 at its center and admits of the ends being bent inward as the key is being driven home between the two cogs. Any attempt to drive the key from its seat would cause the points of the spring to indent the cogs so fully that a withdrawal would be impossible. \Vith this construction the fastening of the cogs is complete and the jar and attrition of the moving wheels would fail to detach the cogs, as is frequently the ease as the cogs are ordinarily secured. \Vhile the object of this invention is to securely fasten keys driven to secure cogs in position, there may be many other uses to which the device is adapted.

Having fully described my invention, what I claim, and desire to secure by Letters Patent,

A means for securing wooden cogs in a wheel-rim, consisting of a key adapted to be inserted between two of such teeth, the key being transversely grooved, and a curved metallic spring fitting in said groove, and having its ends adapted to bite into the adjacent cogs when the key is forced between them,and thus prevent their withdrawal, substantially as de scribed.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witncsses.

BENJAMIN SOHARDT.

\Vitnesses:

B. PIOKERING, SUMNER T. SMITH. 

